Coil antenna
AssigneeNEC Tokin Corporation
InventorsYoshihiko Kato, Naoharu Yamamoto, Makoto Teshima, Mitsuharu Sato
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Abstract
A coil antenna is disclosed comprising a magnetic core and a wire wound around the magnetic core. The magnetic core is made of a mixture comprising soft magnetic powder and an organic binder agent. The magnetic core has a specific complex permeability whose real part μ′ is 20 or more over a frequency range of 10 MHz or less and whose imaginary part μ″ is 10 or more over a frequency range of 10 MHz or more so that the magnetic core is also servable as a noise suppressor against high-frequency noise.
Claims31
A coil antenna comprising a magnetic core and a wire wound around the magnetic core, wherein the magnetic core is made of a mixture comprising soft magnetic powder and an organic binder agent and has a specific complex permeability whose real part μ′ is 20 or more over a frequency range of 10 MHz or less and whose imaginary part μ″ is 10 or more over a frequency range of 10 MHz or more.
Dependencies are inferred from the claim text.